[K12OSN] Re: K12LSTP 6 and fl_teachertool

[Robert Arkiletian]

On 11/20/06, Mel Wade <mel at melwade.com> wrote:
> I'll be glad to add to the Wiki once I get things running...  I'm still
> getting the 111 error.  I'm currently running the tool on the console as
> root.  The console is running in on VMware's Virutal Server.

Below is the specific instructions to enable the control/monitor
features of fl_TT for K12LTSP 5.0 or later. These are not done by
default for two reasons. One is that passwords are different for
everbody. Two is that the x11vnc module is not required by people who
are not using fl_TT. I'm not sure exactly how much resources loading
the x11vnc module takes up on the client but why enable it if people
are not going to use it. Therefore, Eric left it as an option. It's a
one line edit.

1) Edit the file /opt/ltsp/i386/etc/lts.conf and uncomment (remove the
"#") from the following line:

                 X4_MODULE_02 = vnc

2) Now you'll have to make a password for the vnc-session. Run this
command as root user:

                /usr/bin/vncpasswd

3) Again as root user copy the password file into the ltsp-tree

               cp -R -p /root/.vnc /opt/ltsp/i386/root/

4) Important: Reboot your clients

If you wish teachers who do not have root password to run fl_TT, then
follow the instructions below.

 Setting Up Fl_TeacherTool to run with sudo:

    Step 1
    Create a group for teachers using "system-config-users".
    For example 'teachers'. Then add that group to all the users who
    you wish to run fl_teachertool.

    Step 2
    become root with
    $su -
    Then run "visudo". It's a special editor for the sudoers file.
    Add the following line to the end of the file using vi editing techniques

    %teachers  ALL=NOPASSWD:/usr/sbin/fl_teachertool

    make sure that it's not the last line
    (in other words: don't forget to hit enter)
    If you don't know vi then just goto the last line and hit the
    letter "i" for (insert) then type the above line, hit enter, then hit
    the escape key. Now type    :wq     (hit enter) this saves and exits.

    Step 3
    If your fellow teachers are not comfortable typing "sudo
/usr/sbin/fl_teachertool" then add an alias in file .bashrc (notice it
starts with a period) in the home directory of the people who will run
the program like this

    # User specific aliases and functions
    alias teach='sudo /usr/sbin/fl_teachertool'

    Then they only have to type "teach"

    or alternatively put a launcher icon with the command
    sudo /usr/sbin/fl_teachertool
    on their desktop

    Enjoy!


> --
>
> Mel Wade
> "The real problem is not whether machines think but whether men do." - BF
> Skinner
> http://www.melwade.com
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>
>


-- 
Robert Arkiletian
Eric Hamber Secondary, Vancouver, Canada
Fl_TeacherTool http://www3.telus.net/public/robark/Fl_TeacherTool/
C++ GUI tutorial http://www3.telus.net/public/robark/